1WBB

Crystal structure of E. coli DNA mismatch repair enzyme MutS, E38A mutant, in complex with a G.T mismatch

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		7.5		25 MM HEPES(7.5), 300 MM NACL, 10 MM MGCL2, 14 % PEG 6000., pH 7.50

Crystal Properties
Matthews coefficient	Solvent content
2.6	56.2

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 89.553	α = 90
b = 92.494	β = 90
c = 261.264	γ = 90

Symmetry
Space Group	P 21 21 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	CCD	ADSC CCD	SAGITAL FOCUSSING GE (220) AND MULTILAYER.	2002-11-24	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID14-1		ESRF	ID14-1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Net I Over Average Sigma (I)	Redundancy	Number Reflections (All)	Number Reflections (Observed)	Observed Criterion Sigma (F)	Observed Criterion Sigma (I)	B (Isotropic) From Wilson Plot
1	2.5	20	99.3	0.11	9.81	3.12		75289			53.02

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.5	2.59	98.3		0.72	1.48	3.06

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 1E3M	2.5	20	73763	1452	99.3	0.221	0.22	0.27	SAME AS FOR ENTRY 1E3M	18.08

Temperature Factor Modeling
Anisotropic B[1][1]	Anisotropic B[1][2]	Anisotropic B[1][3]	Anisotropic B[2][2]	Anisotropic B[2][3]	Anisotropic B[3][3]
-2.169			4.915		-2.746

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	6.067
r_scangle_it	1.763
r_angle_refined_deg	1.225
r_scbond_it	1.041
r_angle_other_deg	0.799
r_mcangle_it	0.673
r_mcbond_it	0.352
r_symmetry_vdw_refined	0.22
r_nbd_other	0.216
r_symmetry_vdw_other	0.216
r_nbd_refined	0.19
r_symmetry_hbond_refined	0.162
r_xyhbond_nbd_refined	0.152
r_nbtor_other	0.084
r_chiral_restr	0.064
r_bond_refined_d	0.01
r_gen_planes_refined	0.004
r_bond_other_d	0.002
r_gen_planes_other	0.002
r_dihedral_angle_2_deg
r_dihedral_angle_3_deg
r_dihedral_angle_4_deg
r_nbtor_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_mcangle_other
r_scbond_other
r_scangle_other
r_long_range_B_refined
r_long_range_B_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	12163
Nucleic Acid Atoms	714
Solvent Atoms	285
Heterogen Atoms	28

Software

Software
Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling